Classifications

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  • C08G18/161—Catalysts containing two or more components to be covered by at least two of the groups C08G18/166, C08G18/18 or C08G18/22
  • C08G18/163—Catalysts containing two or more components to be covered by at least two of the groups C08G18/166, C08G18/18 or C08G18/22 covered by C08G18/18 and C08G18/22
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  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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  • C08G18/08—Processes
  • C08G18/14—Manufacture of cellular products
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  • C08G18/20—Heterocyclic amines; Salts thereof
  • C08G18/2009—Heterocyclic amines; Salts thereof containing one heterocyclic ring
  • C08G18/2018—Heterocyclic amines; Salts thereof containing one heterocyclic ring having one nitrogen atom in the ring
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  • C08G18/20—Heterocyclic amines; Salts thereof
  • C08G18/2081—Heterocyclic amines; Salts thereof containing at least two non-condensed heterocyclic rings
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/16—Catalysts
  • C08G18/22—Catalysts containing metal compounds
  • C08G18/222—Catalysts containing metal compounds metal compounds not provided for in groups C08G18/225 - C08G18/26
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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  • C08G18/24—Catalysts containing metal compounds of tin
  • C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
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  • C08G18/2805—Compounds having only one group containing active hydrogen
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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  • C08G18/2805—Compounds having only one group containing active hydrogen
  • C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
  • C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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  • C08G18/30—Low-molecular-weight compounds
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  • C08G18/71—Monoisocyanates or monoisothiocyanates
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  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
  • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
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  • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2150/00—Compositions for coatings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2150/00—Compositions for coatings
  • C08G2150/60—Compositions for foaming; Foamed or intumescent coatings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2170/00—Compositions for adhesives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2170/00—Compositions for adhesives
  • C08G2170/60—Compositions for foaming; Foamed or intumescent adhesives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2190/00—Compositions for sealing or packing joints
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2312/00—Crosslinking
  • C08L2312/08—Crosslinking by silane

Definitions

• the present invention relates to compositions with moisture-crosslinking polymers and processes for their production, in particular of silane-functional hybrid polymers, and the moisture-crosslinking polymers as such.
• the present invention relates to the use of these compositions in CASE areas (coatings, adhesives, seals and elastomers), such as, for example, in adhesives and sealants.
• Polymers such as, for example, silylated polyurethanes, which condense (“crosslink”) on contact with water or atmospheric humidity and at room temperature, have long been known. They are also known as moisture-curing polymers. Depending on the content of the silane groups and their structure, among other things, long-chain polymers, wide-meshed three-dimensional networks or highly cross-linked systems can form.
• Moisture-crosslinking polymers in particular silylated polymer urethanes, have long been used as adhesives and sealants in a variety of ways.
• the area of traditional silicone adhesives and sealants based on dimethylpolysiloxanes and polyurethane adhesives and sealants with free isocyanate groups developed into silane-terminated adhesives and sealants.
• Methoxy substituted silanes are typically used. The use of these compounds has become generally established because they have good reactivity. Methoxysilane-substituted polymers, however, have the disadvantage that they split off methanol during curing in use. This is toxicologically questionable.
• the object of the invention is therefore to achieve an improvement in this regard.
• the essence of the invention is therefore to provide a composition with at least two catalysts A and B and at least one silylated polymer (SiP), with catalyst A being selected from the group of metal-siloxane-silanol (-ate) compounds.
• the silylated polymer (SiP) is preferably produced from a metal-siloxane-silanol (-ate) compound-catalyzed synthesis of at least one hydroxy-functionalized polymer (also “hydroxy-functional polymer”) and a compound having at least one isocyanate groups
• the composition according to claim 1 allows the use of ethoxy-substituted silanes.
• SiP hardens, it is not methanol that is split off, but the toxicologically harmless ethanol.
• the polymers cure, acceptable thread-pulling times and tack-free times can be achieved (similar to those with methoxy-functional hybrid polymers;).
• the invention therefore makes it possible to provide formulations, for example for the area of adhesives and sealants, in which the methanol-releasing hybrid polymers can be dispensed with.
• catalyst A is very particularly preferred according to the invention.
• catalyst B is likewise a metal-siloxane-silanol (-ate) compound.
• catalyst B can advantageously also be a metal-organic compound.
• a composition according to the invention advantageously contains moisture-curing silylated polymers (SiP) and at least one metal-siloxane-silanol (-ate) compound, wherein the metal-siloxane-silanol (-at) compound is present in a weight fraction in the range from 0.001 to 5%, preferably from 0.002 to 1%, in each case based on the total weight of the composition.
• SiP moisture-curing silylated polymers
• metal-siloxane-silanol (-ate) compound wherein the metal-siloxane-silanol (-at) compound is present in a weight fraction in the range from 0.001 to 5%, preferably from 0.002 to 1%, in each case based on the total weight of the composition.
• compositions according to the invention preferably contain silylated polymers which by means of catalysis by metal-siloxane-silanol (-at) compounds in molar concentrations in the range from 0.000001 to 0.0001 mol / kg or 0.0001 to 0.1 mol / kg, in particular from 0.00001 to 0.00005 mol / kg or 0.001 to 0.01 mol / kg, each based on the total weight of the composition.
• catalyst refers to a substance that reduces the activation energy of a certain reaction and thereby increases the rate of the reaction.
• metal-siloxane-silanol (metalate) refers to all metal-siloxane compounds which contain either one or more silanol and / or silanolate groups. In one embodiment of the invention, it is also possible that exclusively metal-siloxane-silanolates are present. As long as no individual differentiation is made between these different constellations, all combinations are included.
• POMS oligomeric metallo-silsesquioxanes
• the metal-siloxane-silanol (-at) compound can be present as a monomer, oligomer and / or polymer for producing the silylated polymers (SiP) of the composition according to the invention, the transition from oligomers to polymers according to the general Definition is fluent.
• the metal or metals were preferably present in the oligomeric and / or polymeric metal-siloxane-silanol (-at) compound at the end and / or within the chain.
• the chain-like metal-siloxane-silanol (-at) compound is linear, branched and / or a cage.
• the chain-like metal-siloxane-silanol (-at) compound in the composition according to the invention and / or in the production of the silylated polymers (SiP) of the composition according to the invention has a cage structure.
• a "cage” or an oligomeric or polymeric "cage structure” is understood in the context of the invention as a three-dimensional arrangement of the chain-like metal-siloxane-silanol (-at) compound, with individual atoms of the chain forming the corner points of a polyhedral basic structure of the connection. At least two surfaces are spanned by the atoms linked to one another, whereby a common intersection is created.
• a cube-shaped basic structure of the connection is formed.
• Structure (IVc) represents a single cage structure or a singular cage structure, that is, a connection that is defined by an isolated cage.
• a cage can be “open” or also “closed”. Depending on whether all corner points are connected, linked or coordinated in such a way that one closed cage structure is created.
• the structures (II), (IV), (IVb), (IVc) provide an example of a closed cage.
• the term "nuclear” describes the nuclear nature of a compound, how many metal atoms it contains. A mononuclear compound has one metal atom, whereas a polynuclear or binuclear compound has two metal atoms within a compound. The metals can be linked directly to one another or linked via their substituents.
• An example of a single-core compound according to the invention are provided by e.g. B. the structures (IV), (IVb), (IVc), (Ia) (Ib) or (Ic); a two-core connection represents structure (Id).
• the metal-siloxane-silanol (-ate) compounds (IV), (IVb) and (IVc) represent a single-core single-cage structure.
• Single-core double-cage structures are e.g. B. the structures (Ia), (Ib) or (Ic).
• the metal-siloxane-silanol (-at) compound in the production of the silylated polymers (SiP) of the composition according to the invention preferably comprises an oligomeric metal silsesquioxane.
• the metal-siloxane-silanol (-ate) compound in the production of the silylated polymers (SiP) of the composition according to the invention comprises a polyhedral metal silsesquioxane.
• the metal-siloxane-silanol (-at) compound in the composition according to the invention and / or in the production of the silylated polymers (SiP) has the general formula R * q Si r O s M t , where each R * is independently selected from the group consisting of optionally substituted C1 to C20 alkyl, optionally substituted C3 to C8 cycloalkyl, optionally substituted C2 to C20 alkenyl, optionally substituted C5 to C10 aryl, -OH and -O - (C1- to C10-alkyl), each M is independently selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroups and metals of the 1st, 2nd
• the metal-siloxane-silanol (-at) compound in the composition according to the invention and / or in the production of the silylated polymers (SiP) has the general formula R # 4 Si 4 O 11 Y 2 Q 2 X 4 Z 3 , where each X is independent is selected from the group consisting of Si, M 1 , -M 3 L 1 ⁇ , M 3 , or -Si (R 8 ) -OM 3 L 1 ⁇ , where M 1 and M 3 are selected independently of one another from the group consisting of from s and p block metals, d and f block transition metals, lanthanide and actinide metals and semi-metals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th Subgroup and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably from the group consisting of Na
• Subgroup and metals of the 1st, 2nd, 3rd, 4th and 5th main group preferably from the group consisting of Na, Zn, Sc, Nd, Ti, Zr, Hf, V, Fe, Pt, Cu, Ga, Sn and Bi; particularly preferably from the group consisting of Zn, Ti, Zr, Hf, V, Fe, Sn and Bi, each Q independently of one another is H, M 4 L 4 ⁇ , -SiR 8 , -M 3 L 1 ⁇ , a single bond linked to M 3 of X or a single bond linked to the Si atom of the radical -Si (R 8 ) -OM 3 L 1 ⁇ denotes, where M 3 , R 8 and L 1 are as defined for X, where M 4 is selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from the group consisting of metals of the 1st
• the metal-siloxane-silanol (-at) compound in the composition according to the invention and / or in the production of the silylated polymers (SiP) knows the general formula (Y 0.25 R # SiO 1.25 ) 4 ( Z 0.75 Y 0.25 XO) 4 (OQ) 2 , where each X is independently selected from the group consisting of Si, M 1 , -M 3 L 1 ⁇ , M 3 , or -Si (R 8 ) -OM 3 L 1 ⁇ , where M 1 and M 3 are independently selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semi-metals, in particular from the group consisting of metals 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroup and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably
• the metal-siloxane-silanol (-at) compound in the composition according to the invention and / or in the production of the silylated polymers (SiP) preferably has the general formula Si 4 O 9 R 1 R 2 R 3 R 4 X 1 X 2 X 3 X 4 OQ 1 OQ 2 Y 1 Y 2 Z 1 Z 2 Z 3 , where X 1 , X 2 and X 3 are independently selected from Si or M 1 , where M 1 is selected from the group consisting of s and p Block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from the group consisting of metals from the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroup and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably from the group consisting of Na, Zn, Sc, Nd, Ti, Zr, Hf, V
• L 1 is selected from the group consisting of -OH and -O- (C1- to C10-alkyl), in particular -O- (C1- to C8-alkyl) or -O- (C1- to C6- Alkyl), or where L 1 is selected from the group consisting of -OH, -O-methyl, -O-ethyl, -O-propyl, -O-butyl, -O-octyl, -O-isopropyl, and -O -Isobutyl, and where M 3 is selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semi-metals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroup and metals of the 1st, 2nd, 3rd, 4th and 5
• the metal silsesquioxane in the composition according to the invention and / or in the production of the silylated polymers (SiP) has the general formula (X 4 ) (Z 1 Y 1 X 2 O) (Z 2 X 1 O 2 ) (Z 3 X 3 O 2 ) (R 1 Y 2 SiO) (R 3 SiO) (R 4 SiO 2 ) (R 2 SiO 2 ) (Q 1 ) (Q 2 ), where X 1 , X 2 and X 3 are independently selected from Si or M 1 , where M 1 is selected from the group consisting of s and p block metals, d and f Block transition metals, lanthanide and actinide metals and semi-metals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroups and metals of the 1st, 2nd ., 3rd, 4th and 5
• the catalyst used according to the invention based on a metal-siloxane-silanol (-ate) compound can be described by the structure (I), in which X 1 , X 2 and X 3 are independently selected from Si or M 1 , where M 1 is selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from Group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroup and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably from the group consisting of Na, Zn, Sc, Nd, Ti, Zr, Hf, V, Fe, Pt, Cu, Ga, Sn and Bi; particularly preferably from the group consisting of Zn, Ti, Zr, Hf, V, Fe, Sn and Bi, Z 1 ,
• L 1 is selected from the group consisting of -OH and -O- (C1-bis C10-alkyl), in particular -O- (C1- to C8-alkyl) or -O- (C1- to C6-alkyl), or where L 1 is selected from the group consisting of -OH, -O-methyl, - O-ethyl, -O-propyl, -O-butyl, -O-oc
• the metal-siloxane-silanol (-ate) compound in the preparation of the silylated polymers has the general formula (I), where X 1 , X 2 and X 3 are independently Si, X 4 -M 3 L 1 ⁇ and Q 1 and Q 2 each signify a single bond linked to M 3 , L 1 being selected from the group consisting of -OH and -O- (C1- to C10-alkyl), in particular -O- (C1- to C8-alkyl) or -O- (C1- to C6-alkyl), or where L 1 is selected from the group consisting of -OH, -O-methyl, -O-ethyl, -O -Propyl, -O-butyl, -O-octyl, -O-isopropyl, and -O-isobutyl, and where M 3 is selected from the group consisting of s and p block metal
• the metal-siloxane-silanol (-at) compound according to formula (I) in the composition according to the invention and / or in the production of the silylated polymers (SiP) can be mononuclear as a monomer or polynuclear as, depending on the metal equivalents present Dimer (two-core), trimer (three-core), multimer (multi-core) and / or mixtures thereof are present, so that, for example, structures according to formulas (Ia) to (Id) are possible,
• polynuclear metal-siloxane-silanol (-ate) compounds which can be used according to the invention are the structures (Ia), (Ib), (Ic) or (Id), in which M is selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroups and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably from the group consisting of Na, Zn, Sc, Nd, Ti, Zr, Hf, V, Fe, Pt, Cu, Ga, Sn and Bi; particularly preferably from the group consisting of Zn, Ti, Zr, Hf, V, Fe, Sn and Bi, and each R (R 1 to R 4 ) is independently selected from the group consisting of optionally substitute
• the tetravalent metal M represents a common part of several cages.
• the person skilled in the art knows that the number of bonds to the metal M depends on the valency of the metal M.
• the structural formulas (Ia) to (Ic) may have to be adapted accordingly.
• composition according to the invention a mixture of the metal-siloxane-silanol (-ate) compounds according to formula (I), (Ia), (Ib) and (Ic) is used therein and / or in the production of the silylated polymer (SiP) ) for use.
• the polynuclear metal-siloxane-silanol (-at) compound according to formula (Id) in the composition according to the invention and / or in the production of the silylated polymers (SiP) can have 6-fold coordinated metal centers, so that structures according to formula (Id) possible are where each M is independently selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semi-metals, in particular from the group consisting of metals of the 1st, 2nd, 3rd, 4th, 5th, 8th, 10th and 11th subgroups and metals of the 1st, 2nd, 3rd, 4th and 5th main group, preferably from the group consisting of Na, Zn, Sc, Nd, Ti, Zr, Hf , V, Fe, Pt, Cu, Ga, Sn and Bi; particularly preferably from the group consisting of Zn, Ti, Zr, Hf, V
• the term “monocyclic” describes the cage structure of the catalyst according to the invention which is isolated, that is to say singularly, based on a metal-siloxane-silanol (-ate) compound.
• Mononuclear catalysts based on a metal-siloxane-silanol (-at) compound can be encompassed by structure (IV) and also by structures (I) and (II).
• L 1 is selected from the group consisting of -OH and -O- (C1- to C10-alkyl), in particular -O- (C1- to C8-alkyl) or -O - (C1- to C6-alkyl), or where L 1 is selected from the group consisting of -OH, -O-methyl, -O-ethyl, -O-propyl, -O-butyl, -O-octyl, - O-isopropyl and -O-isobutyl, and where M 3 is selected from the group consisting of s and p block metals, d and f block transition metals, lanthanide and actinide metals and semimetals, in particular from the group consisting of metals of the 1.
• the metal-siloxane-silanol (-ate) compounds of the general structural formula (II) used in the production of the silylated polymers according to the invention relates to where X 4 -M 3 L 1 ⁇ where L 1 is selected from the group consisting of -OH and -O- (C1- to C10-alkyl), in particular -O- (C1- to C8-alkyl) or -O- (C1- to C6-alkyl), or where L 1 is selected from the group consisting from -OH, -O-methyl, -O-ethyl, -O-propyl, -O-butyl, -O-octyl, -O-isopropyl, and -O-isobutyl, and where M 3 is selected from the group consisting from s and p block metals, d and f block transition metals, lanthanide and actinide metals and semi-metals, in particular
• the silylated polymers (SiP) of the composition according to the invention can have been produced as a metal-siloxane-silanol (-ate) compound by a catalyzed reaction with heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) and / or the composition includes them.
• TiPOSS stands for the mononuclear titanium-metallized silsesquioxane of structural formula (IV) and can be used equivalent to “heptaisobutyl POSS-titanium (IV) -ethoxide” within the meaning of the invention.
• the metal-siloxane-silanol (-ate) compound can contain a mixture containing the structures (I), (Ia), (Ib), (Ic), (Id), (II), (IV), (IVb), (IVc) represent.
• the metal in the metal-siloxane-silanol (-ate) compound is a titanium.
• catalysts from the group of metal-siloxane-silanol (-at) compounds are heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) and heptaisobutyl POSS-tin (IV) -ethoxide (SnPOSS). Of these, preferred is heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS).
• the catalyst B is not selected from the group of the metal-siloxane-silanol (-at) compounds, they are preferably metal-organic compounds. Tin, bismut, zinc, zirconium, aluminum or organo-titanium compounds are particularly preferred. Organotin or organotitanium compounds are very particularly preferred.
• the catalyst B can then be selected from the group consisting of tetraalkyl titanates, such as tetramethyl titanate, tetraethyl titanate, tetra-n-propyl titanate, tetraisopropyl titanate, tetra-n-butyl titanate, tetra-isobutyl titanate, tetra-sec-butyl titanate, tetra-sec-butyl titanate, ethylhexyl) titanate, dialkyl titanate ((RO) 2 TiO 2 , where R is, for example, isoPropyl, n-butyl, iso-butyl), such as isopropyl-n-butyl titanate; Titanium acetylacetonate chelates, such as di-isopropoxy-bis (acetylacetonate) titanate, di-isopropoxy-bis (ethylacetylacetonate) titanate, di-
• the catalyst B can preferably be selected from the group consisting of dibutyltin dilaurate (DBTL), tin (II) -2-ethylhexanoate (tin octoate), zinc (II) -2-ethylhexanoate, zinc (II) neodecanoate, bismuth (III) - tris (2-ethylhexonate), bismuth (III) tris (neodecanoate) or mixtures thereof.
• DBTL dibutyltin dilaurate
• tin (II) -2-ethylhexanoate tin octoate
• zinc (II) -2-ethylhexanoate zinc
• II) neodecanoate bismuth (III) - tris (2-ethylhexonate)
• bismuth (III) tris neodecanoate
• the catalyst B is particularly preferably dibutyltin dilaurate (DBTL).
• the catalysts are preferably present in a ratio between 1:10 and 10: 1, more preferably the catalysts A and B are present in a ratio between 1: 8 and 8: 1, particularly preferably the catalysts A and B are in one Ratio between 1: 5 and 5: 1 to one another, more particularly preferably the catalysts A and B are present in a ratio between 1: 2 and 2: 1 to one another, very particularly preferably in a ratio of 0.9: 1.1 and 1.1: 0.9 in relation to one another, based on percent by weight.
• the total amount of catalyst, composed of at least one catalyst A and one catalyst B is between 5 and 30,000 ppm, more preferably between 15 and 20,000 ppm, particularly preferably between 20 and 15,000 ppm, very particularly preferably between 20 and 10,000 ppm based on the total weight of the composition.
• silane-modified polymers are silane-modified, silane-functional or silane-terminated polymers, which are also referred to interchangeably as SMP, STP or SiP.
• SMP silane-modified polymer
• STP silane-terminated polymers
• SiP silane-terminated polymers
• the definition includes polymers, polycondensates or polyadducts.
• Silane-functional polymers are commonly used and, according to the invention, also referred to as hybrid polymers. These polymers can combine the curing chemistry of alkoxysilane groups with the chemistry of polyols or polyurethanes. Alkoxysilane groups are known from silicone chemistry; the isocyanate-functional polymers, in particular hydroxy-functional polymers, contribute at least parts of the backbone (“polymer backbone”) of the hybrid polymer. Crosslinking (“curing”) takes place via the reactive silane end groups through the ingress of, for example, atmospheric moisture. The curing mechanism of these systems is preferably neutral.
• Alkoxy denotes an alkyl group which is connected to the main carbon chain or the main skeleton of the compound via an oxygen atom.
• N denotes in particular nitrogen.
• O denotes in particular oxygen, unless stated otherwise.
• S denotes sulfur, unless otherwise stated.
• P denotes phosphorus, unless stated otherwise.
• C denotes in particular carbon, unless stated otherwise.
• H denotes in particular hydrogen, unless stated otherwise.
• Si denotes in particular silicon, unless otherwise stated.
• “Optionally substituted” means that hydrogen atoms in the corresponding group or in the corresponding radical can be replaced by substituents.
• Substituents can in particular be selected from the group consisting of C1 to C4 alkyl, methyl, ethyl, propyl, butyl, phenyl, benzyl, halogen, fluorine, chlorine, bromine, iodine, Hydroxy, amino, alkylamino, dialkylamino, C1 to C4 alkoxy, phenoxy, benzyloxy, cyano, nitro, and thio. If a group is designated as optionally substituted, 0 to 50, in particular 0 to 20, hydrogen atoms of the group can be replaced by substituents. When a group is substituted, at least one hydrogen atom is replaced by a substituent.
• alkyl group it is meant a saturated hydrocarbon chain.
• alkyl groups have the general formula —C n H 2n + 1 .
• the term “C1 to C16 alkyl group” refers in particular to a saturated hydrocarbon chain with 1 to 16 carbon atoms in the chain. Examples of C1 to C16 alkyl groups are methyl, ethyl, propyl, butyl, isopropyl, isobutyl, sec-butyl, tert-butyl, n-pentyl and ethylhexyl.
• a “C1 to C8 alkyl group” denotes in particular a saturated hydrocarbon chain with 1 to 8 carbon atoms in the chain. In particular, alkyl groups can also be substituted, even if this is not specifically stated.
• Straight chain alkyl groups refer to alkyl groups that contain no branches. Examples of straight-chain alkyl groups are methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl and n-octyl.
• Branched alkyl groups denote alkyl groups which are not straight-chain, that is to say in which the hydrocarbon chain in particular has a fork.
• Examples of branched alkyl groups are isopropyl, iso-butyl, sec-butyl, tert-butyl, sec-pentyl, 3-pentyl, 2-methylbutyl, iso-pentyl, 3-methylbut-2-yl , 2-methylbut-2-yl, neopentyl, ethylhexyl, and 2-ethylhexyl.
• alkenyl groups refer to hydrocarbon chains that contain at least one double bond along the chain.
• an alkenyl group with a double bond has, in particular, the general formula -CnH2n-1.
• alkenyl groups can also have more than one double bond.
• C2 to C16 alkenyl group refers in particular to a hydrocarbon chain with 2 to 16 carbon atoms in the chain.
• the number of hydrogen atoms varies depending on the number of double bonds in the alkenyl group. Examples of alkenyl groups are vinyl, allyl, 2-butenyl and 2-hexenyl.
• Straight-chain alkenyl groups refer to alkenyl groups that do not contain any branches. Examples of straight-chain alkenyl groups are vinyl, allyl, n-2-butenyl and n-2-hexenyl.
• Branched alkenyl groups denote alkenyl groups which are not straight-chain, in which the hydrocarbon chain in particular has a fork. Examples of branched alkenyl groups are 2-methyl-2-propenyl, 2-methyl-2-butenyl and 2-ethyl-2-pentenyl.
• Aryl groups denote monocyclic (e.g. phenyl-), bicyclic (e.g. indenyl-, naphthalenyl, tetrahydronapthyl, or tetrahydroindenyl) and tricyclic (e.g.
• a C4 to C14 aryl group denotes an aryl group having 4 to 14 carbon atoms.
• Aryl groups can in particular also be substituted, even if this is not specifically stated.
• silylated polymers which are moisture-curing can be used in the compositions according to the invention, in particular silylated polyethers and / or silylated polyurethane polymers (SPUR).
• Silylated polymers or silane-terminated polymers which can be used in the composition according to the invention contain at least two or more reactive silane groups e.g. B. alkoxy silanes.
• silylated polymers that can be used according to the invention are oxyalkylene polymers which have at least one reactive silane group at each end of the polymer molecule.
• the backbone or backbone of the silane-terminated oxyalkylene polymer according to the invention has the repetitive formula (1): -RO- (1) where R is a divalent organic group, preferably a straight or branched alkylene group containing 1 to 14 carbon atoms, particularly preferably a straight or branched alkylene group containing 2 to 4 carbon atoms, or mixtures thereof.
• R is a divalent organic group, preferably a straight or branched alkylene group containing 1 to 14 carbon atoms, particularly preferably a straight or branched alkylene group containing 2 to 4 carbon atoms, or mixtures thereof.
• Polypropylene oxide backbones, polyethylene oxide backbones and copolyethylene oxide / copolypropylene oxide backbones or mixtures thereof are very particularly preferred.
• repeating units can include, but are not limited to, -CH 2 -O-, -CH 2 CH (CH 3 ) O-, -CH 2 CH (C 2 H 5 ) O-, -CH 2 C (CH 3 ) O-, -CH 2 CH 2 CH 2 CH 2 O- and other structurally similar.
• At least one hydrolyzable or hydroxy group is represented by G.
• hydrolyzable groups are those which change due to the influence of water, e.g. B. from the humidity or by adding water or water-containing constituents, hydrolysis reactions can enter and as a result of which can form silanols.
• Hydrolyzable groups can be, for example, alkoxy groups, more rarely also -Cl. In a similar way, these groups (or the silanols formed by them) can react with OH or COOH groups on surfaces and form a bond.
• siliconols are organic silicon compounds in which at least one hydroxyl group (OH) is bonded to the silicon atom (-Si-OH).
• siliconolates are organic silicon compounds in which at least one deprotonated hydroxyl function (RO-) is bonded to the silicon atom (-Si-O-), whereby this negatively charged oxygen atom can also be chemically covalently bonded and / or coordinated to other compounds, such as metals.
• RO- deprotonated hydroxyl function
• isocyanate-reactive compounds are those which can react with an isocyanate. These compounds can have one or more NH, OH or SH functions.
• the isocyanate-reactive compounds include in particular the class of hydroxy-functional compounds.
• Polyols are hydroxy-functional compounds, especially hydroxy-functional polymers.
• Suitable polyols for the production of polyurethane polymers are in particular polyether polyols, polyester polyols and polycarbonate polyols and mixtures of these polyols.
• Polyethers represent a class of polymers. They are long-chain compounds comprising at least two identical or different ether groups. According to the invention, the term polyethers is also used when the polymeric ether groups are interrupted by other groups (for example by polymerized / built-in isocyanates or further polymer or oligomer units of other monomer origins).
• polyether polyols also called polyoxyalkylene polyols or oligoetherols
• polyoxyalkylene polyols or oligoetherols are those which are polymerization products of ethylene oxide, 1,2-propylene oxide, 1,2- or 2,3-butylene oxide, oxetane, tetrahydrofuran or mixtures thereof, optionally polymerized with the aid of a starter molecule with two or more active hydrogen atoms such as water, ammonia or compounds with several OH or NH groups such as 1,2-ethanediol, 1,2- and 1,3-propanediol, neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and Tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octaned
• Both polyoxyalkylene polyols that have a low degree of unsaturation (measured in accordance with ASTM D-2849-69 and stated in milliequivalents of unsaturation per gram of polyol (mEq / g)), produced for example with the help of so-called double metal cyanide complex catalysts (DMC- Catalysts), as well as polyoxyalkylene polyols with a higher degree of unsaturation, produced for example with the aid of anionic catalysts such as NaOH, KOH, CsOH or alkali metal alcoholates.
• DMC- Catalysts double metal cyanide complex catalysts
• Polyoxyethylene polyols and polyoxypropylene polyols are particularly suitable.
• Polyoxyalkylene diols or polyoxyalkylene triols with a degree of unsaturation lower than 0.02 mEq / g and with a molecular weight in the range of are particularly suitable 1000 to 30,000 g / mol, as well as polyoxyethylene diols, polyoxyethylene triols, polyoxypropylene diols and polyoxypropylene triols with a molecular weight of 200 to 20,000 g / mol.
• ethylene oxide-terminated ethylene oxide-terminated
• EOendcapped ethylene oxide-endcapped polyoxypropylene polyols
• the latter are special polyoxypropylene polyoxyethylene polyols that are obtained, for example, by further alkoxylating pure polyoxypropylene polyols, in particular polyoxypropylene diols and triols, after the polypropoxylation reaction has ended with ethylene oxide and thus have primary hydroxyl groups.
• polyoxypropylene polyoxyethylene diols and polyoxypropylene polyoxyethylene triols are preferred.
• hydroxyl-terminated polybutadiene polyols such as, for example, those which are prepared by polymerization of 1,3-butadiene and allyl alcohol or by oxidation of polybutadiene, and their hydrogenation products.
• styrene-acrylonitrile-grafted polyether polyols such as are commercially available, for example, under the trade name Lupranol® from Elastogran GmbH, Germany.
• polyester polyols are polyesters which carry at least two hydroxyl groups and are produced by known processes, in particular the polycondensation of hydroxycarboxylic acids or the polycondensation of aliphatic and / or aromatic polycarboxylic acids with dihydric or polyhydric alcohols.
• Polyester polyols which are produced from dihydric to trihydric alcohols such as, for example, 1,2-ethanediol, diethylene glycol, 1,2-propanediol, dipropylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and neopentyl glycol are particularly suitable , Glycerol, 1,1,1-trimethylolpropane or mixtures of the aforementioned alcohols with organic dicarboxylic acids or their anhydrides or esters such as succinic acid, glutaric acid, adipic acid, trimethyladipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, maleic acid, fumaric acid, phalsic fatty acid , Isophthalic acid, terephthalic acid, dimethyl terephthalate, hexahydrophthalic acid, trimellitic acid
• Polyester diols are particularly suitable, especially those made from adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, dimer fatty acid, phthalic acid, isophthalic acid and terephthalic acid as dicarboxylic acid or from lactones such as ⁇ -caprolactone and from ethylene glycol, diethylene glycol, neopentylene glycol, and neopentylene glycol , 1,6-hexanediol, dimer fatty acid diol and 1,4-cyclohexanedimethanol as dihydric alcohol.
• polycarbonate polyols are those obtainable by reacting, for example, the abovementioned alcohols used to synthesize the polyester polyols with dialkyl carbonates such as dimethyl carbonate, diaryl carbonates such as diphenyl carbonate or phosgene.
• dialkyl carbonates such as dimethyl carbonate
• diaryl carbonates such as diphenyl carbonate or phosgene.
• Polycarbonate diols, in particular amorphous polycarbonate diols are particularly suitable.
• polystyrene resins are poly (meth) acrylate polyols.
• polyhydroxy-functional fats and oils for example natural fats and oils, especially castor oil, or so-called oleochemical polyols obtained by chemical modification of natural fats and oils, the epoxy polyesters obtained, for example, by epoxidation of unsaturated oils and subsequent ring opening with carboxylic acids or alcohols or epoxy polyethers, or polyols obtained by hydroformylation and hydrogenation of unsaturated oils.
• polyols which are obtained from natural fats and oils through degradation processes such as alcoholysis or ozonolysis and subsequent chemical linkage, for example through transesterification or dimerization, of the degradation products obtained in this way or derivatives thereof.
• Suitable degradation products of natural fats and oils are in particular fatty acids and fatty alcohols and fatty acid esters, in particular the methyl esters (FAME), which can be derivatized, for example, by hydroformylation and hydrogenation to give hydroxy fatty acid esters.
• FAME methyl esters
• polyhydrocarbon polyols also called oligohydrocarbonols
• polyhydroxy-functional ethylene-propylene, ethylene-butylene or ethylene-propylene-diene copolymers such as those produced by Kraton Polymers, USA, or polyhydroxy-functional copolymers made from dienes such as 1,3-butanediene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene, or polyhydroxy-functional polybutadiene polyols, for example those which are produced by copolymerization of 1,3-butadiene and allyl alcohol and can also be hydrogenated.
• polyhydroxy-functional acrylonitrile / butadiene copolymers such as those produced, for example, from epoxides or amino alcohols and carboxyl-terminated acrylonitrile / butadiene copolymers, which are commercially available under the name Hypro® CTBN from Emerald Performance Materials, LLC, USA.
• These likewise particularly preferred polyols have an average molecular weight of 250 to 40,000 g / mol, in particular 1000 to 30,000 g / mol, and an average OH functionality in the range from 1.6 to 3.
• polyester polyols and polyether polyols are polyester polyols and polyether polyols, in particular polyoxyethylene polyol, polyoxypropylene polyol and polyoxypropylene polyoxyethylene polyol, preferably polyoxyethylene diol, polyoxypropylene diol, polyoxyethylene triol, polyoxypropylene triol, polyoxypropylene polyoxyethylene diol and polyoxypropylene polyoxyethylene triol.
• small amounts of low molecular weight di- or polyhydric alcohols such as 1,2-ethanediol, 1,2- and 1,3-propanediol, Neopentyl glycol, diethylene glycol, triethylene glycol, the isomeric dipropylene glycols and tripropylene glycols, the isomeric butanediols, pentanediols, hexanediols, heptanediols, octanediols, nonanediols, decanediols, undecanediols, dimeric alcohols, 1, 4-cyclohexane, fatty alcohols, 1,3- and 1,4-cyclohexanedimethanol 1,1-trimethylolethane, 1,1,1-trimethylolpropane, glycerol, pentaerythritol, sugar alcohols such as xylene alcohols, 1,2-ethane
• silylated polymers can be produced in two routes by a metal-siloxane-silanol (-at) compound-catalyzed synthesis of at least one isocyanate-reactive compound, in particular a hydroxy-functionalized polymer, and a compound having at least one isocyanate groups.
• the synthesis takes place via the synthesis, catalyzed by a metal-siloxane-silanol (-ate) compound, of an isocyanate-reactive compound, in particular a hydroxy-functionalized polymer, and a di- or polyisocyanate compound (Iso).
• a metal-siloxane-silanol (-ate) compound of an isocyanate-reactive compound, in particular a hydroxy-functionalized polymer, and a di- or polyisocyanate compound (Iso).
• the prepolymer obtained containing isocyanate groups is then reacted with an aminosilane (AmSi) to form the silylated polymer (SiP) according to the invention.
• this synthesis route is referred to as the “AmSi route”.
• suitable diisocyanates are 1,6-hexamethylene diisocyanate (HDI), methylenediphenyl isocyanate (MDI), in particular of 4,4'-methylenediphenyl isocyanate (4,4 'MDI), 2,4' methylenediphenyl isocyanate (2,4 'MDI), 2,2' -Methylene diphenyl isocyanate (2,2 'MDI), 4,4'-diisocyanatodicyclohexylmethane (H12MDI), 2-methylpentamethylene-1,5-diisocyanate, 2,2,4- and 2,4,4-trimethyl-1,6-hexamethylene diisocyanate (TMDI), 1.12 dodecamethylene diisocyanate, lysine and lysine ester diisocyanate, cyclohexane-1,3-diisocyanate, cyclohexane-1,4-diisocyanate, 3-isocyanato-HD
• aminosilanes Organosilanes whose organic radical has an amino group are referred to as “aminosilanes".
• Primary aminosilanes are aminosilanes which have a primary amino group, that is to say an NH2 group that is bonded to an organic radical.
• Secondary aminosilanes are aminosilanes which have a secondary amino group, that is to say an NH group which is bonded to two organic radicals.
• the composition according to the invention contains two catalysts A and B, A being heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) or heptaisobutyl POSS-tin (IV) -ethoxide (SnPOSS) and B being dibutyltin laurate (DBTL) or heptaisobutyl POSS tin (IV) ethoxide (SnPOSS) when A is not heptaisobutyl is POSS tin (IV) ethoxide (SnPOSS).
• A being heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) or heptaisobutyl POSS-tin (IV) -ethoxide (SnPOSS)
• B being dibutyltin laurate (DBTL) or heptaisobutyl POSS tin (IV
• the silylated polymer (SiP) is selected by a synthesis of at least one isocyanate-reactive compound (component A) from the group of compounds having NH, OH or SH functions and one or more at least one isocyanate groups comprising compound selected from the group of isocyanates (Iso) and / or isocyanato-silanes (Iso-Si), catalyzed by at least one mononuclear metal-siloxane-silanol (-at) compound.
• component A isocyanate-reactive compound
• component A isocyanates
• Iso-Si isocyanato-silanes
• the silylated polymer (SiP) is selected from the group consisting of polypropylene diols, polyester polyols, or mixtures thereof and one or more compounds having at least one isocyanate groups selected from the synthesis of at least one hydroxy-functionalized polymer (component A) Group of 4,4'-methylenediphenyl isocyanate (4,4'-MDI), isophorone diisocyanate (IPDI) or mixtures thereof and / or 3- (triethoxysilyl) methyl isocyanate, 3- (Triethoxysilyl) propyl isocyanate, or mixtures thereof, catalyzed by at least one mononuclear single-cage metal-siloxane-silanol (-ate) compound.
• component A Group of 4,4'-methylenediphenyl isocyanate (4,4'-MDI), isophorone diisocyanate (IPDI) or mixtures thereof and / or 3- (triethoxys
• the silylated polymer (SiP) is selected from the group consisting of polypropylene diols, polyester polyols, or mixtures thereof and one or more compounds having at least one isocyanate groups selected from the synthesis of at least one hydroxy-functionalized polymer (component A) Group of 4,4'-methylenediphenyl isocyanate (4,4'-MDI), isophorone diisocyanate (IPDI) or mixtures thereof and / or 3- (triethoxysilyl) methyl isocyanate, 3- (triethoxysilyl) propyl isocyanate, or mixtures thereof, catalyzed by at least one mononuclear Titanium-siloxane-silanol (-at) compound, in particular by heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS).
• component A Group of 4,4'-methylenediphenyl isocyanate (4,4'-MD
• the silylated polymer (SiP) is selected by reaction with an aminosilane (AmSi) from the group consisting of N- [3- (triethoxysilyl) methyl] butylamine, N- [3- (triethoxysilyl) propyl] butylamine, N- (3-triethoxysilyl-propyl) -amino-succinic acid diethyl ester or a mixture thereof.
• AmSi aminosilane
• the silylated polymer (SiP) of the composition according to the invention is selected from the group of polypropylene diols, polyester polyols, or mixtures thereof by a synthesis catalyzed with heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) a component B selected from the group of 3- (triethoxysilyl) methyl isocyanate, 3- (triethoxysilyl) propyl isocyanate or mixtures thereof.
• heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) a component B selected from the group of 3- (triethoxysilyl) methyl isocyanate, 3- (triethoxysilyl) propyl isocyanate or mixtures thereof.
• the silylated polymer (SiP) of the composition according to the invention is selected from the group of polypropylene diols, polyester polyols, or mixtures thereof by a synthesis catalyzed with heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) with a component B selected from the group of 4,4'-methylenediphenyl isocyanate (4,4'-MDI), isophorone diisocyanate (IPDI) or mixtures thereof and subsequent silanization with an aminosilane selected from the group of N- [3- (triethoxysilyl) methyl] butylamine, N- [3- (triethoxysilyl) propyl] butylamine, N- (3-triethoxysilyl-propyl) -amino-succinic acid-diethyl ester or a mixture thereof.
• a component B selected from the group of 4,4'-methylened
• all of the above combinations have heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) as a catalyst in the synthesis of the silylated polymer (SiP).
• all of the above combinations in the embodiments have POSS-titanium (IV) -ethoxide (TiPOSS) instead of heptaisobutyl in the synthesis of the silylated polymer (SiP), but heptaisobutyl POSS-tin (IV) -ethoxide (SnPOSS) or a mixture of both catalysts.
• only heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) is contained as a catalyst in the synthesis of the silylated polymer (SiP).
• the composition according to the invention of all of the above combinations has a further catalyst selected from among metal-siloxane-silanol (-ate) compounds, in particular heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) or heptaisobutyl POSS-tin ( IV) ethoxide (SnPOSS), dibutyltin dilaurate (DBTL) or mixtures thereof.
• a further catalyst selected from among metal-siloxane-silanol (-ate) compounds, in particular heptaisobutyl POSS-titanium (IV) -ethoxide (TiPOSS) or heptaisobutyl POSS-tin ( IV) ethoxide (SnPOSS), dibutyltin dilaurate (DBTL) or mixtures thereof.
• all of the above combinations of the composition according to the invention have dibutyltin dilaurate (DBTL) as the second catalyst.
• DBTL dibutyltin dilaurate
• these additives from the group comprising one or more fillers selected from the group of inorganic and organic fillers, in particular natural, ground or precipitated calcium carbonates, which are optionally coated with fatty acids, in particular stearic acid, barite (barite) , Talc, quartz flours, quartz sand, dolomites, wollastonites, kaolins, calcined kaolins, mica (potassium aluminum silicate), molecular sieves, aluminum oxides, aluminum hydroxides, magnesium hydroxide, silicas including highly dispersed silicas from pyrolysis processes, industrially produced carbon black, graphite, metal powder such as Aluminum, copper, iron, silver or steel, PVC powder or hollow balls, one or more adhesion promoters from the group consisting of the silanes, in particular aminosilanes such as 3-aminopropyl-trimethoxysilane, 3-aminopropyl-dimethoxymethylsilane, N- (2-a)
• the composition according to the invention additionally contains a water scavenger, preferably a vinylalkoxysilane, particularly preferably vinyltrimethoxysilane (VTMO).
• VTMO vinyltrimethoxysilane
• silylated polymers (SiP) In the production of the silylated polymers (SiP) according to the invention, either the entire isocyanate-containing compound (component B) or the entire isocyanate-reactive compound, in particular the hydroxy-functionalized polymer (component A), is preferably initially introduced, followed by the addition of the other component A or B in each case, subsequently mixed with at least one metal-siloxane-silanol (metalate) compound and the components allowed to react with one another. The end product is then optionally produced from the resulting intermediate product by a reaction with the aminosilane (AmSi). If one or more components are also used, these can in principle be added to the reaction mixture at any point in time.
• AmSi aminosilane
• the process according to the invention is preferably carried out at temperatures of at least 0 ° C., particularly preferably at least 20 ° C. and preferably at most 150 ° C., in particular at most 80 ° C.
• the method according to the invention is preferably carried out with exclusion of (air) moisture and at the pressure of the surrounding atmosphere, that is to say about 900 to 1100 hPa.
• the inventive method can be carried out continuously, e.g. B. in a tubular reactor or tubular reactor with several adjacent or one behind the other metering points, or discontinuously, z. B. in a conventional reaction vessel with a stirrer.
• Step 1 MDI prepolymer synthesis: reaction of 4,4'-MDI with PolyU L 4000 and TiPOSS as a catalyst
• Step 2 synthesis of aminosilane synthesis: reaction of diethyl maleate with 3-aminopropyl-triethoxysilane
• reaction sequence A1 was repeated using 0.625 g of a 1% DBTL solution in DINCH as catalyst. The following steps were carried out in the same way as previously described. A triethoxysilane-terminated polymer ESTP 2 with a viscosity of 28,000 mPa * s was obtained.
• Step 1 MDI prepolymer synthesis: reaction of 4,4'-MDI with PolyU L 4000 and TiPOSS as a catalyst
• Step 2 aminosilane synthesis: reaction of diethyl maleate with 3-aminopropyl-trimethoxysilane
• the MDI prepolymer synthesis step 1 of reaction sequence A1 was repeated using 0.625 g of a 1% DBTL solution in DINCH as catalyst.
• the following steps were carried out in the same way as previously described.
• 240 g of MDI prepolymer with 0.006 g of DBTL were mixed with 37.5 g of N- (3-trimethoxysilylpropyl) amino succinic acid diethyl ester under a nitrogen atmosphere at room temperature with stirring.
• the reaction was over after 2 hours and free isocyanate could no longer be detected.
• a trimethoxysilane-terminated polymer MSTP 2 with a viscosity of 25,000 mPa * s was obtained.
• the curing behavior of the silane-terminated polymers was tested by determining the thread-pulling time FZ and tack-free time KF on 2 mm thick samples at 23 ° C / 50% r. Lf.
• the samples were prepared and cured without a catalyst and with TiPOSS, DBTL or a combination of TiPOSS and DBTL.
• Table A Curing behavior of triethoxysilane-terminated (ESTP 1 to 4) and trimethoxysilane-terminated (MSTP 1 to 4) polymers using TiPOSS and DBTL ESTP 1 FZ / KF ESTP 2 FZ / KF ESTP 3 FZ / KF ESTP 4 FZ / KF MSTP 1 FZ / KF MSTP 2 FZ / KF MSTP 3 FZ / KF MSTP 4 FZ / KF 1 2 3 4th 5 6th 7th 8th VR 1 Without further cat.
• the triethoxysilane-terminated polymers were catalyzed by the reaction of MDI prepolymer with N- (3-triethoxysilylpropyl) amino succinic acid diethyl ester (ESTP 1, TiPOSS-catalyzed and ESTP 2, DBTL-catalyzed) and by the reaction of triethoxysilylpropyl isocyanate with polyol (ESTP 3, TiPOSS-catalyzed and ESTP 4, DBTL-catalyzed) obtained.
• columns 5, 6, 7 and 8 describe the reactions of the corresponding trimethoxysilane-terminated polymers (MSTP 1 to 4) prepared in the same way.
• Table B Composition in parts by weight and results of the evaluation of an exemplary standard sealant and adhesive using the ethoxsilane-terminated polymer ESTP 3 example 1 ESTP 3 25 * chalk 45 Plasticizers 20th Titanium dioxide 3.35 Water catcher 1.5 Adhesion promoter 1.95 DBTL 0.2 Skin formation time [min] 22nd Shore A hardness 35 Density [g / cm 3 ] 1.43 * Contains 0.13 parts by weight TiPOSS
• the present invention relates to the composition and the method for the production of polyurethane prepolymers and polyurethane systems based on polyols, di- or polyisocyanates and a TiPOSS-based catalyst.
• preferred TiPOSS-based catalysts are those in the EP 2 989 155 B1 and the EP 2 796 493 A1 are disclosed. The disclosure of these documents is referred to in full with regard to the catalysts.
• the catalysts (metallosilsesquioxane) according to embodiment 5 are particularly preferred EP 2 989 155 B1 .
• the model recipes from the application areas CASE, flexible foam and flexible foam (block foam) were examined with regard to their hardening behavior at room temperature (23 ° C / 50% r.h.) using different polyols and isocyanates with the same catalyst content of TiPOSS and DBTDL or tin octoate.
• the investigations were carried out on the assumption that a complete stoichiometric conversion (index 100) between isocyanate and polyol can take place. In principle, the investigations also apply to the production of prepolymers.
• the catalytic activity of the investigated catalysts was determined by determining and comparing the start time, thread-pulling time and tack-free time.
• the polyol A component consisted of a polypropylene diol and the TiPOSS catalyst, which was present in diisononyl phthalate (DINP) as a 20% solution.
• DINP diisononyl phthalate
• the amount of catalyst in each case was 0.2 percent by weight (without taking into account the amount of solvent).
• the molecular weight was also varied from low (MW -2000) to high (MW -18000), since it can be assumed that the reactivity of the Polypropylene polyols, which are inert anyway, continue to decrease with increasing molecular weight and thus differences in reactivity can be observed particularly well.
• the polypropylene polyols with MW 2000 (Rokopol D2002, PCC Rokita), MW ⁇ 8000 (Rokopol LDB 8000), MW 12000 (Rokopol LDB 12000) and MW ⁇ 18000 (Rokopol LDB 18000) were tested.
• the isocyanates P-MDI (Voranate M230, Dow), IPDI (Wanate IPDI, DKSH) and HDI trimer isocyanurates (Vestanat HT2500 / 100) were used as crosslinking components.
• the reaction between polyol A and isocyanate B components was carried out by stirring the two components for 10 s at 1000 rpm using a conventional propeller stirrer. After the stirring process had ended, the reaction mass obtained was poured into plates with a thickness of ⁇ 6mm (10 g). The curing characteristics were determined based on the start, thread-pulling and tack-free time.
• the thread pulling and curing speed of silane-terminated polyurethanes was determined on 6 mm SPUR plates, which were produced by mixing the silane-terminated polyurethanes with 0.2 percent by weight of TiPOSS and DBTL (each in solution, 20% in DINP). Mixing took place with exclusion of air in an argon inert gas atmosphere with a conventional propeller stirrer. The mixed material was heated at 23 ° C / 50% r.h. hardened.
• DINP diisononyl phthalate
• a corresponding same polyol A component was prepared using DBTDL.
• the amount of catalyst in each case was 0.2 percent by weight (without taking into account the DINP solvent).
• the isocyanate P-MDI (Voranate M230) was used as the crosslinking component.
• the reaction between polyol A and isocyanate B components was carried out by stirring the two components for 10 s at 2500 rpm using a conventional propeller stirrer. The conversion took place stoichiometrically. After the stirring process was completed, the reaction mass obtained (20 g) was poured into beakers. The curing characteristics were determined based on the start and tack-free time.
• the polyol A component consisted of a standard polyester polyol based on Desmophen 2200 B, an amine catalyst (N, N-dimethylpiperazine and N-N-dimethylhexadecylamine), cell stabilizers, water and the TiPOSS catalyst, which was present as a 20% solution in DINP.
• an amine catalyst N, N-dimethylpiperazine and N-N-dimethylhexadecylamine
• cell stabilizers cell stabilizers
• water water
• TiPOSS catalyst which was present as a 20% solution in DINP.
• tin octoate The amount of catalyst of TiPOSS and tin octoate was in each case 0.03 percent by weight.
• the isocyanate Desmodur T65 and a prepolymer with an NCO content of approx. 12% were used as crosslinking components. The conversion took place in the stoichiometric ratio (index 100).
• the reaction between the polyol A and the isocyanate B components was carried out by stirring the two components for 10 s at 1000 rpm with a Visco Jet stirrer. After the stirring process had ended, the reaction mass obtained (400 g) was poured into a 2 L wooden box and the hardening characteristics were determined on the basis of the starting and tack-free times.
• prepolymers which are obtained from the reaction of KOH-based polyols and aliphatic and aromatic isocyanates, can be achieved with significantly lower amounts of TiPOSS catalyst (1/5 to 1/10) and / or a and / or temperature reduction ( ⁇ 80 ° C ) and / or a shortening of the response time. Since the formation of by-products leads to an undesirable increase in viscosity during this preparation process, a significant improvement in the conduct of the reaction and product quality can be assumed.
• TiPOSS as a catalyst increases the curing speed in 2-component polyurethane clear casting systems and PU coatings. By increasing the molecular weight, the mechanical properties of the paints and casting compounds are significantly improved.
• the production of 2-component polyurethane systems for the FIPFG process based on TiPOSS-catalyzed curing is particularly advantageous, as the curing process is accelerated by the higher reactivity of TiPOSS compared to DBTL.
• the polyurethane products can also be manufactured without tin compounds that are harmful to health, which is particularly important for the manufacture of sealing materials in the medical field, kitchen applications, etc.
• the curing of 1-component isocyanate-terminated prepolymers can be accelerated by using TiPOSS. There is no need to use tin compounds that are harmful to health. This is of particular relevance when these prepolymers are used as adhesives for conventional floor coverings, since possible contamination, even if only small amounts of tin, via the skin of the feet can be avoided.

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• 2019
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